By Andy Bruce LONDON (Reuters) -British consumers increased borrowing by the most in three years over February and March, according to data that would typically be a sign of solid demand but might now reflect how the cost-of-living squeeze is forcing some households deeper into debt. The Bank of England said lending to consumers rose by 1.3 billion pounds ($1.6 billion) in net terms in March. That was as expected in a Reuters poll of economists following a nearly 1.6 billion-pound increase in February. It marked the highest borrowing over a two-month period since early 2019. Credit card lendin…